CN221276079U - Material dissolving barrel of overflow dyeing machine - Google Patents

Abstract

The utility model discloses a dissolving bucket of an overflow dyeing machine, which comprises a bucket body, a mounting box arranged at the bottom of the bucket body and a stirring device arranged on the bucket body, wherein a filtering device is arranged on the bucket body and comprises a filtering box, a butt plate and a driving mechanism, the filtering box is connected to the bucket body in a sliding manner, one end of the filtering box is positioned in the bucket body, and the other end of the filtering box is positioned in the mounting box; a plurality of first filtration pores have been seted up on the upper surface of rose box, be provided with the butt board in the rose box, the lateral wall of butt board is contradicted in the inside wall of rose box and the upper surface is contradicted in the interior roof of rose box, has seted up a plurality of second filtration pores with first filtration pore dislocation distribution on the butt board, and the actuating mechanism sets up on the mounting box and is used for driving the rose box along vertical direction reciprocating motion. In operation, movement of the filter box is advantageous in reducing the likelihood of dye, impurities depositing on the filter box, thereby reducing the likelihood of clogging the filter holes with impurities and large particles of undispersed dye.

Description

Material dissolving barrel of overflow dyeing machine

Technical Field

The utility model relates to the technical field of overflow dyeing machines, in particular to a material dissolving bucket of an overflow dyeing machine.

Background

The overflow dyeing machine is mainly used for pretreatment and dyeing of various pure cotton, pure polyester, polyester cotton, spandex and other knitted grey fabrics, and the common overflow dyeing machine comprises an L-shaped dye vat, a cloth lifting wheel, a nozzle, a cloth guide pipe, a dye liquor circulation system and a chemical charging barrel, wherein the chemical charging barrel is used for preparing dye liquor after putting dye into the chemical charging barrel.

The utility model patent of China with the authorized bulletin number of CN211665380U discloses a chemical bucket of a high-temperature and high-pressure overflow dyeing machine, which comprises a bucket body and a stirring device, wherein a cross beam is arranged on the bucket body, the stirring device comprises a stirring motor, a stirring shaft, a stirring hub and stirring blades, a lifting plate is arranged at the bottom of the bucket body, a mounting box is connected at the bottom of the bucket body, a lifting assembly is arranged in the mounting box and comprises a first motor, a cam and a lifting rod, the first motor is arranged on the mounting box, an output shaft of the first motor is fixedly connected with the axle center of the cam, and the lifting rod moves up and down along the contour of the cam; and the end face of the bottom end of the barrel body is provided with a perforation through which the lifting rod passes, and the lifting rod passes through the perforation to be abutted with the lifting plate.

As the filtering plate is arranged on the inner wall of the liquid outlet, the stirred dye flows out of the liquid outlet after being filtered by the filtering plate, and impurities and large particles in the filtering barrel are still undispersed dye to easily cause the blocking of the filtering plate in the filtering process, so that the filtering efficiency of the dye is affected.

Disclosure of utility model

In order to reduce the possibility that impurities in the dye and large-particle undispersed dye block a filter plate in the dye discharge process, thereby improving the filtering efficiency of the dye, the utility model provides a chemical bucket of an overflow dyeing machine.

The utility model provides a material dissolving bucket of an overflow dyeing machine, which adopts the following technical scheme:

The utility model provides a change storage bucket of overflow dyeing machine, includes the staving of vertical setting, sets up in the mounting box of staving bottom and sets up the agitating unit on the staving, be provided with filter equipment on the staving, filter equipment includes rose box, butt board and actuating mechanism, the rose box slides and connects on the staving and be located the agitating unit below, rose box one end is located the staving, and the other end is located the mounting box and the opening sets up; the filter box comprises a filter box body, and is characterized in that a plurality of first filter holes are formed in the upper surface of the filter box body, a butt plate horizontally arranged is arranged in the filter box body, the side wall of the butt plate is abutted against the inner side wall of the filter box body, the upper surface of the butt plate is abutted against the inner top wall of the filter box body, a plurality of second filter holes distributed in a staggered mode with the first filter holes are formed in the butt plate body, the driving mechanism is arranged on the mounting box body and used for driving the filter box body to reciprocate along the vertical direction, and a discharging pipe is arranged at the bottom of the mounting box body.

By adopting the technical scheme, the upper surface of the abutting plate always abuts against the inner top wall of the filter box in the dye liquor stirring process, so that the dye liquor cannot pass through the first filter holes; when the stirring of the dye liquor in the barrel body is completed, the driving mechanism drives the filter box to reciprocate along the vertical direction, and when the filter box moves along the direction close to the stirring device, a blanking space is formed between the inner top wall of the filter box and the abutting plate, the dye liquor in the barrel body can be filtered through the first filtering hole and the second filtering hole in sequence, and the filtered dye liquor is discharged through the discharging pipe; in operation, the reciprocating motion of the filter box is beneficial to reducing the possibility of dye and impurities deposited on the filter box, thereby reducing the possibility of blocking the filter holes by the impurities and large-particle undispersed dye and improving the filtering efficiency of the dye.

Optionally, actuating mechanism includes two sets of actuating components and a plurality of spring, be provided with the connecting plate that the level set up on the rose box, the connecting plate is located the staving below, a plurality of the spring sets up on the connecting plate and keeps away from connecting plate one end and set up on the staving, two sets of actuating components symmetry sets up on the mounting box and is used for driving the connecting plate motion.

By adopting the technical scheme, after the dye liquor in the barrel is stirred, the driving component is used for driving the connecting plate to intermittently move upwards, and the spring is used for driving the connecting plate to reset, so that the connecting plate can reciprocate along the vertical direction, and the movement of the connecting plate drives the filter box to move; when the inner top wall of the filter box is in conflict with the upper surface of the abutting plate, the dye liquor can not pass through the first filter hole, when the inner top wall of the filter box is no longer in conflict with the upper surface of the abutting plate, the dye liquor is filtered through the first filter hole and then filtered through the second filter hole, and then the dye liquor after the filtering can be discharged through the discharge pipe, so that the dye liquor filter has a reasonable structure.

Optionally, the drive assembly includes first motor, first axle and eccentric wheel, first motor sets up on the mounting box, first axle coaxial arrangement is on first motor, the eccentric wheel sets up on first epaxial and the lateral wall is contradicted in the connecting plate lower surface.

Through adopting above-mentioned technical scheme, start first motor, the rotation of first motor output shaft drives first axle and rotates, and the rotation of first axle drives the eccentric wheel and rotates, and the eccentric wheel rotates in-process collision connecting plate to make the connecting plate follow vertical direction reciprocating motion under the effect of spring, simple structure, convenient operation.

Optionally, a limiting mechanism for limiting the filtering box is arranged on the barrel body.

Through adopting above-mentioned technical scheme, the in-process of agitating unit stirring dye liquor, the flow of dye liquor probably can drive the rose box upward movement for in the partial dye liquor of incomplete stirring was flowed to the installation box, was discharged together with the dye liquor that the stirring was accomplished later, led to the homogeneity of dye liquor to reduce, and stop gear's setting can carry out spacingly to the rose box.

Optionally, stop gear includes first cylinder, second shaft and stopper, first cylinder sets up on the staving, the second shaft is coaxial to be set up on first cylinder, the stopper sets up on the second shaft and contradicts the rose box upper surface.

Through adopting above-mentioned technical scheme, start first cylinder, the flexible first axle motion that drives of first cylinder piston rod, the motion of first axle drives the stopper motion, can carry out spacing to the rose box when the stopper is contradicted in the upper surface of rose box, simple structure, convenient operation.

Optionally, the stirring device comprises a stirring motor, a stirring shaft and a stirring paddle, wherein the stirring motor is arranged on the barrel body, the stirring shaft is coaxially arranged on the stirring motor, and the stirring paddle is arranged on the stirring shaft.

Through adopting above-mentioned technical scheme, start agitator motor, agitator motor output shaft's rotation drives the (mixing) shaft and rotates, and the rotation of (mixing) shaft drives the stirring rake and rotates, and the stirring rake rotates the in-process and can stir the dyestuff in the staving, rational in infrastructure.

Optionally, a circulation mechanism is arranged on the barrel body and is used for extracting the dye liquor at the bottom of the barrel body to the top of the barrel body.

Through adopting above-mentioned technical scheme, circulation mechanism's setting is favorable to improving the mobility of stirring in-process dye liquor, reduces the deposit of dyestuff and causes the inhomogeneous possibility of stirring to be favorable to improving the dyeing effect of follow-up cloth.

Optionally, the circulation mechanism includes circulating pipe, first valve and pump, the circulating pipe sets up on the staving and one end is located the staving bottom, the other end is located the stirring rake top, first valve and pump all set up on the circulating pipe, the pump is used for extracting the dye liquor of staving bottom.

Through adopting above-mentioned technical scheme, the in-process of stirring dyestuff of stirring rake opens first valve, starts the pump of taking out, and the dye liquor of staving bottom is taken out to the staving top through the circulating pipe under the effect of pump of taking out to this mobility that improves staving bottom dyestuff.

Optionally, the inner bottom wall of the mounting box is formed into an inclined slope, and the inclined height of the inclined slope is gradually reduced along the direction close to the discharging pipe.

Through adopting above-mentioned technical scheme, the dyestuff of accomplishing of filtration can be more abundant discharge through the discharging pipe under the guide flow on inclined plane, reduces the dyestuff adhesion and on the diapire and cause extravagant possibility in the mounting box.

Optionally, the second filter hole has a smaller filter hole diameter than the first filter hole.

Through adopting above-mentioned technical scheme, first filtration hole carries out the first filtration to the dye liquor, and the second filtration hole carries out the second filtration to the dye liquor, and the twice is filtered and is favorable to reducing the possibility that contains impurity in the dye liquor, improves the dye liquor quality.

In summary, the present application at least comprises at least one of the following beneficial technical effects:

1. In operation, the reciprocating motion of the filter box is beneficial to reducing the possibility of dye and impurities deposited on the filter box, thereby reducing the possibility of blocking the filter holes by the impurities and large-particle undispersed dye and improving the filtering efficiency of the dye.

2. The diameter of the second filtering holes is smaller than that of the first filtering holes, and the twice filtering is beneficial to reducing the possibility of impurities in the dye liquor and improving the quality of the dye liquor.

3. The circulation mechanism is beneficial to improving the fluidity of dye liquor in the stirring process and reducing the possibility of uneven stirring caused by dye deposition.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present application.

Fig. 2 is a perspective cross-sectional view of the tub, the mounting box, and the filtering device of fig. 1.

Fig. 3 is an exploded view of the connection of the abutment plate, the bottom wall of the tub and the filter box of fig. 2.

Reference numerals illustrate:

1. A tub body; 11. a feed pipe; 12. a discharge pipe; 13. a communication hole; 14. a dovetail groove; 15. dovetail blocks; 16. a second valve; 17. a first plate; 2. a mounting box; 21. an inclined plane; 22. a support rod; 23. a support plate; 3. a stirring device; 31. a stirring motor; 32. a stirring shaft; 33. stirring paddles; 34. a circulation mechanism; 341. a circulation pipe; 342. a first valve; 343. a material pump; 4. a filtering device; 41. a filter box; 411. a first filter aperture; 42. an abutting plate; 421. a second filter aperture; 43. a driving mechanism; 44. a connecting plate; 441. a material leakage hole; 431. a drive assembly; 4311. a first motor; 4312. a first shaft; 4313. an eccentric wheel; 432. a spring; 51. a limiting mechanism; 511. a first cylinder; 512. a second shaft; 513. and a limiting block.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-3.

The embodiment of the application discloses a material dissolving bucket of an overflow dyeing machine, which comprises a horizontally arranged mounting box 2, wherein the upper end of the mounting box 2 is provided with an opening, a vertically arranged bucket body 1 is fixedly connected to the upper surface of the mounting box 2, and a material feeding pipe 11 is fixedly connected to the upper surface of the bucket body 1.

Referring to fig. 1 and 2, a stirring device 3 for stirring dye liquor is arranged on the upper surface of a barrel body 1, the stirring device comprises a stirring motor 31, a stirring shaft 32 and a stirring paddle 33, the stirring motor 31 is fixedly connected to the upper surface of the barrel body 1, an output shaft is vertically arranged, the stirring shaft 32 is coaxially and fixedly connected to the output shaft of the stirring motor 31 and is positioned in the barrel body 1, and the stirring paddle 33 is fixedly connected to the stirring shaft 32.

Referring to fig. 1 and 2, a circulation mechanism 34 is disposed on a tub 1, the circulation mechanism 34 includes a circulation pipe 341, a first valve 342 and a pump 343, the circulation pipe 341 is fixedly connected to a side wall of the tub 1, one end of the circulation pipe 341 penetrates through an outer side wall of the tub 1 and is located at the bottom of the tub 1, the other end penetrates through an outer side wall of the tub 1 and is located above a stirring paddle 33, the first valve 342 and the pump 343 are fixedly connected to the circulation pipe 341, the first valve 342 is located between the mounting box 2 and the pump 343, and the pump 343 is used for pumping dye liquor at the bottom of the tub 1.

Referring to fig. 1 and 2, in the process of stirring the dye liquor, the first valve 342 is opened, the material pump 343 is started, the dye liquor at the bottom of the barrel body 1 is pumped to the top of the barrel body 1 through the circulating pipe 341 under the action of the material pump 343, so that the fluidity of the dye at the bottom of the barrel body 1 is improved, and the possibility of uneven stirring caused by deposition of the dye is reduced.

Referring to fig. 2 and 3, a filtering device 4 is disposed on the tub 1, the filtering device 4 includes a filtering box 41, an abutting plate 42 and a driving mechanism 43, a communication hole 13 communicating with the cavity of the mounting box 2 is formed in the bottom wall of the tub 1, four dovetail grooves 14 are formed in the side wall of the communication hole 13, the dovetail grooves 14 penetrate through the bottom wall of the tub 1, and the four dovetail grooves 14 are circumferentially distributed on the side wall of the communication hole 13.

Referring to fig. 2 and 3, the filter box 41 is arranged in the communication hole 13 in a penetrating manner and is vertically arranged in the length direction, the filter box 41 is arranged below the stirring paddle 33 and is arranged at the lower end of the filter box 41, the upper end of the filter box 41 is arranged in the barrel body 1, the lower end of the filter box is arranged in the mounting box 2, four dovetail blocks 15 are fixedly connected to the side wall of the filter box 41, the dovetail blocks 15 are in one-to-one correspondence with the dovetail grooves 14 and are connected in the dovetail grooves 14 in a sliding manner, and the filter box 41 and the dovetail blocks 15 are all in sliding sealing connection with the inner bottom wall of the barrel body 1.

Referring to fig. 2 and 3, a plurality of first filtering holes 411 are formed in the upper surface of the filtering box 41, a supporting rod 22 is fixedly connected to the inner bottom wall of the installation box 2, the supporting rod 22 is fixedly connected to the upper surface of the supporting rod 22 and horizontally arranged, the supporting rod 42 is located in the filtering box 41, the side wall of the supporting rod is abutted against the inner side wall of the filtering box 41, the upper surface of the supporting rod 42 is abutted against the inner top wall of the filtering box 41, a plurality of second filtering holes 421 are formed in the upper surface of the supporting rod 42, the second filtering holes 421 are distributed in a staggered mode with the first filtering holes 411, and the diameter of the filtering holes 421 of the second filtering holes 421 is smaller than that of the first filtering holes 411.

Referring to fig. 2 and 3, the driving mechanism 43 is disposed on the mounting box 2 and is used for driving the filter box 41 to reciprocate along the vertical direction, the driving mechanism 43 includes two groups of driving assemblies 431 and four springs 432, a connecting plate 44 horizontally disposed is fixedly connected to the lower surface of the filter box 41, a material leakage hole 441 communicated with the cavity of the filter box 41 is formed in the upper surface of the connecting plate 44, the four springs 432 are distributed on the upper surface of the connecting plate 44, one end of each spring 432 is fixedly connected to the upper surface of the connecting plate 44, the other end of each spring 432 is fixedly connected to the lower surface of the barrel 1, and the length direction of each spring 432 is vertically disposed.

Referring to fig. 2 and 3, two horizontally arranged support plates 23 are fixedly connected to the side wall of the mounting box 2, the two support plates 23 are symmetrically distributed on two sides of the filter box 41, the driving components 431 are in one-to-one correspondence with the support plates 23 and are arranged on the support plates 23, each driving component 431 comprises a first motor 4311, a first shaft 4312 and an eccentric wheel 4313, the first motor 4311 is fixedly connected to the upper surface of the support plate 23 and is horizontally arranged on the output shaft, the first shaft 4312 is coaxially and fixedly connected to the output shaft of the first motor 4311, one end of the first shaft 4312 is located in the mounting box 2, the first shaft 4312 is in rotary sealing connection with the mounting box 2, and the eccentric wheel 4313 is fixedly connected to the first shaft 4312 and the side wall of the eccentric wheel is abutted to the lower surface of the connecting plate 44.

Referring to fig. 2 and 3, the first motor 4311 is started, the rotation of the output shaft of the first motor 4311 drives the first shaft 4312 to rotate, the rotation of the first shaft 4312 drives the eccentric wheel 4313 to rotate, and the eccentric wheel 4313 collides with the connecting plate 44 in the rotating process, so that the connecting plate 44 reciprocates in the vertical direction under the action of the spring 432, and the movement of the connecting plate 44 drives the filter box 41 to move; when the inner top wall of the filter box 41 is abutted against the upper surface of the abutting plate 42, the dye liquor cannot pass through the first filter holes 411, and when the inner top wall of the filter box 41 is separated from the upper surface of the abutting plate 42, the dye liquor can be filtered through the first filter holes 411 and then pass through the second filter holes 421.

Referring to fig. 2 and 3, a discharging pipe 12 is fixedly connected to the side wall of the mounting box 2, a discharging end is positioned at the bottom of the mounting box 2, the inner bottom wall of the mounting box 2 is formed into an inclined surface 21, and the inclined surface 21 gradually reduces in inclined height along the direction approaching to the discharging pipe 12; the second valve 16 is fixedly connected to the discharging pipe 12, and the filtered dye liquor can be discharged through the discharging pipe 12 by opening the second valve 16.

Referring to fig. 1 and 2, a limiting mechanism 51 is disposed on a barrel 1, the limiting mechanism 51 includes a first cylinder 511, a second shaft 512 and a limiting block 513, a first plate 17 is fixedly connected to a side wall of the barrel 1, the first cylinder 511 is fixedly connected to an upper surface of the first plate 17, a piston rod is horizontally disposed, the second shaft 512 is coaxially and fixedly connected to the piston rod of the first cylinder 511, one end of the second shaft is located in the barrel 1, the limiting block 513 is fixedly connected to the piston rod of the first cylinder 511 and horizontally disposed, and a lower surface of the limiting block 513 is abutted against an upper surface of the filter box 41; the limiting block 513 always abuts against the upper surface of the filter box 41 during the stirring process of the dye liquor.

The implementation principle of the material dissolving barrel of the overflow dyeing machine provided by the embodiment of the application is as follows:

The stirring motor 31 is started, the rotation of the output shaft of the stirring motor 31 drives the stirring paddle 33 to rotate to stir the dye in the barrel body 1, the limiting block 513 always abuts against the upper surface of the filter box 41 in the stirring process of the dye liquor, the inner top wall of the filter box 41 abuts against the upper surface of the abutting plate 42, and the dye liquor which is not stirred can not pass through the first filtering holes 411.

In the process of stirring the dye, the first valve 342 is opened, the material pump 343 is started, and the dye liquor at the bottom of the barrel body 1 is pumped to the top of the barrel body 1 through the circulating pipe 341 under the action of the material pump 343, so that the fluidity of the dye at the bottom of the barrel body 1 is improved.

After the dye stirring is completed, a first air cylinder 511 is started, the expansion and contraction of a piston rod of the first air cylinder 511 drives a first shaft 4312 to move, and the movement of the first shaft 4312 drives a limiting block 513 to move until the limiting block 513 moves to one side of the dovetail block 15 far away from the filter box 41; then, the first motor 4311 is started, the rotation of the output shaft of the first motor 4311 drives the eccentric wheel 4313 to rotate, and the eccentric wheel 4313 collides with the connecting plate 44 in the rotating process, so that the connecting plate 44 reciprocates in the vertical direction under the action of the spring 432, and the movement of the connecting plate 44 drives the filter box 41 to move; when the filter box 41 moves upwards, the inner top wall does not contact the upper surface of the abutting plate 42 any more, the dye liquor can be filtered through the first filter holes 411 and then filtered through the second filter holes 421, then the second valve 16 is opened, and the filtered dye liquor can be discharged through the discharging pipe 12.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (10)

1. The utility model provides a change storage bucket of overflow dyeing machine, includes staving (1) of vertical setting, sets up in installation box (2) of staving (1) bottom and sets up agitating unit (3) on staving (1), its characterized in that: the novel water purifier is characterized in that a filtering device (4) is arranged on the barrel body (1), the filtering device (4) comprises a filtering box (41), an abutting plate (42) and a driving mechanism (43), the filtering box (41) is connected to the barrel body (1) in a sliding mode and is located below the stirring device (3), one end of the filtering box (41) is located in the barrel body (1), and the other end of the filtering box is located in the mounting box (2) and is provided with an opening; offer a plurality of first filtration pore (411) on the upper surface of rose box (41), be provided with butt board (42) that the level set up in rose box (41), the lateral wall of butt board (42) is contradicted in the inside wall of rose box (41) and upper surface is contradicted in the interior roof of rose box (41), offer a plurality of second filtration pore (421) with first filtration pore (411) dislocation distribution on butt board (42), actuating mechanism (43) set up on mounting box (2) and are used for driving rose box (41) along vertical direction reciprocating motion, the bottom is provided with discharging pipe (12) on mounting box (2).

2. The chemical vat of an overflow dyeing machine according to claim 1, wherein: the driving mechanism (43) comprises two groups of driving assemblies (431) and a plurality of springs (432), a connecting plate (44) which is horizontally arranged is arranged on the filtering box (41), the connecting plate (44) is located below the barrel body (1), the springs (432) are arranged on the connecting plate (44) and far away from one end of the connecting plate (44) to be arranged on the barrel body (1), and the driving assemblies (431) are symmetrically arranged on the mounting box (2) and used for driving the connecting plate (44) to move.

3. A chemical vat for an overflow dyeing machine according to claim 2, characterized in that: the driving assembly (431) comprises a first motor (4311), a first shaft (4312) and an eccentric wheel (4313), wherein the first motor (4311) is arranged on the mounting box (2), the first shaft (4312) is coaxially arranged on the first motor (4311), and the eccentric wheel (4313) is arranged on the first shaft (4312) and the side wall of the eccentric wheel is abutted against the lower surface of the connecting plate (44).

4. The chemical vat of an overflow dyeing machine according to claim 1, wherein: a limiting mechanism (51) for limiting the filter box (41) is arranged on the barrel body (1).

5. The chemical bucket of an overflow dyeing machine according to claim 4, wherein: the limiting mechanism (51) comprises a first air cylinder (511), a second air cylinder (512) and a limiting block (513), wherein the first air cylinder (511) is arranged on the barrel body (1), the second air cylinder (511) is coaxially arranged on the first air cylinder (511), and the limiting block (513) is arranged on the second air cylinder (512) and abuts against the upper surface of the filter box (41).

6. The chemical vat of an overflow dyeing machine according to claim 1, wherein: stirring device (3) are including (31) stirring motor, (32) stirring axle and stirring rake (33), stirring motor (31) set up on staving (1), (32) coaxial setting is on stirring motor (31), stirring rake (33) set up on (32) stirring axle.

7. The chemical vat of an overflow dyeing machine according to claim 6, wherein: the dyeing machine is characterized in that a circulating mechanism (34) is arranged on the barrel body (1), and the circulating mechanism (34) is used for extracting dye liquor at the bottom of the barrel body (1) to the top of the barrel body (1).

8. The vat of an overflow dyeing machine according to claim 7, wherein: the circulating mechanism (34) comprises a circulating pipe (341), a first valve (342) and a material pumping pump (343), wherein the circulating pipe (341) is arranged on the barrel body (1), one end of the circulating pipe is positioned at the bottom end of the barrel body (1), the other end of the circulating pipe is positioned above the stirring paddle (33), the first valve (342) and the material pumping pump (343) are both arranged on the circulating pipe (341), and the material pumping pump (343) is used for pumping dye liquor at the bottom of the barrel body (1).

9. The chemical vat of an overflow dyeing machine according to claim 1, wherein: the inner bottom wall of the installation box (2) is formed into an inclined surface (21), and the inclined surface (21) gradually reduces in inclined height along the direction approaching the discharging pipe (12).

10. The chemical vat of an overflow dyeing machine according to claim 1, wherein: the second filter holes (421) have a smaller filter hole diameter than the first filter holes (411).